Never got the Navistar 5000

I pre-ordered the game and have been playing it for a while. Now I realized I never got the promised Navistar 5000. Any way how to still get it?

You preordered the game knowing youll have the navistar and you realised you don't have it after more than half year?

I know it sounds stupid, but yes. Stopped playing for a while and saw a video of someone driving that truck. I googled about it because I couldn't find it and it said something about pre ordering. Then I realized "Hey thats what the advertisements said"